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Hi all,
i hope someone has any advice on this (i did try to search it without any luck) :)

So, I shut down my pump from 7pm to 7am and that cause my Pentair UltraTemp 90 to go into "low pressure warning" which shuts it down.
i know the heat pump will work more in the morning due the night drop in temperature but i really look forward to give my neighbors a good night rest :)

Anyone knows if this practice will harm the heat pump in any way? i realize is not a "good" practice but looks like a good workaround!?

A low pressure warning is usually caused by low or no water pressure going through the heat pump. This will not cause harm if the water pump is shut down but power still supplied to the heat pump, this warning will appear to prevent any damage to the unit.

Im ok with the message since i know it will be cause by the water pump been off but you raised a question in me i didnt thought about before.

The heat pump will still receive electric power, maybe i should put it on the same timer with the water pump so the heat pump shuts down at the same time and i dont supply power to it. What would you say?